Aaron L. Dennison
Established in the USA then in England.
Industrialisation of watchmaking: development of a system called "American System of Watch Manufacturing" (interchangeability system).
Establishment, with Edward Howard and Samuel Curtis, of the future Waltham Watch Company (established at Waltham - USA, in 1954): first watchmaking factory to produce perfectly interchangeable parts of movements. It met with success creating competitively priced watches.
Founder of a watch case factory in Birmingham (GB).